“His family life in Abbottabad was a source of genuine solace for bin Laden, who believed deeply that polygamy was a religious obligation. To his close male friends he used to joke, ‘I don’t understand why people take only one wife. If you take four wives you live like a groom.’ ”

But, adds "Manhunt," to keep up with his wives, bin Laden had to mix a natural version of Viagra and dye his hair black.